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Finding the Fourth Proportional to 1,549.57, 2,321.62 and 817.53

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Solution

The fourth proportional to 1,549.57, 2,321.62 and 817.53 is: 1,224.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.57 : 2,321.62 = 817.53 : x
  2. Step 2: Convert to fraction form
    1,549.57/2,321.62 = 817.53/x
  3. Step 3: Cross multiply
    1,549.57x = 2,321.62 × 817.53
  4. Step 4: Simplify right side
    1,549.57x = 1,897,991.95
  5. Step 5: Solve for x
    x = 1,897,991.95/1,549.57
  6. Step 6: Final answer
    x = 1,224.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.